Edge of a Shadow, Part One (en Inglés) - J.E. McDonald

While one world burns, another is poised to collide.

Sashen de Shoale, heir to Ondosha's throne, must save her world from destruction. Oracles blame humans from another realm for the fissure tearing through their land and unraveling the natural order. Using ancient Traveller technology, Sashen and her assassin-trained sister open a portal in a desperate gamble to prevent catastrophe-but only one of them makes it through.

Earth has changed since the fey last made contact centuries ago...

Special Agent Ander Martinez has faced chimera and battled demons-but nothing prepares him for the vortex that materializes over a collapsed building in Wickwood. His colleagues are swept through, leaving him alone to face the wrong side of a fey warrior's deadly blades. Their clash won't mend the barrier between worlds, nor will it bring his team or her sister back.

And with time unraveling, every realm teeters on the edge of chaos.